如何将负字节值转换为 mb、gb 等？

Question

In my angular application I am converting bytes to MB , GB etc.

I am getting data from backend.
I have for example: All ram, Availble Ram and Used Ram.
All values are stored as long in our case. I am just converting these values.
For "Available Ram" the formula is "AllRam - UsedRam" and getting minus value is considered ok.

But in case of negative values it is not working.

Function I am using is:

 const SIZES = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];

 formatBytes(bytes, decimals = 1) {
    for (var i = 0, r = bytes, b = 1024; r > b; i++) r /= b;         
    return `${parseFloat(r.toFixed(decimals))} ${SIZES[i]}`;
  }

Tried to add if statement with bytes < 0 but that didn't help.

Answer 1

I guess Math.abs() could solve the issue:

 const suffixes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'], formatBytes = (n, decimals) => { const suffixIndex = suffixes.findIndex((_,i) => Math.abs(n) < 1024**i)-1 return `${((0|10**decimals*n/1024**suffixIndex)/10**decimals)} ${suffixes[suffixIndex]}` } console.log(formatBytes(-38750,2))